JPH0611936U - Detachable spindle rotation control unit for machine tools - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a detachable spindle turning control unit for machine tools having a payout spindle that does not require separate and independent drive sources. [Structure] A rotary spindle 2 is provided with a feed spindle 1 in which a slide spindle having a cutting tool attached to the tip thereof is inserted and arranged, and the slide spindle 5 is rotationally driven together with the rotary spindle 2 and is moved in the axial direction. A detachable spindle turning control unit 10 is detachably mounted on a machine tool.
A unit case 11 in which the unit 10 is attached to the spindle case 1c in a substantially detachable and non-rotatable manner;
A swivel case 12 mounted on the unit case 11 so as to be rotatable about a parallel swivel axis A parallel to the rotary main shaft 2,
The turning case 12 has a machining axis B perpendicular to the parallel turning axis A.
A cutting tool T2 that is rotatably mounted around it, a rotary drive mechanism 13 that converts the rotation of the rotary spindle 2 into a rotation of the cutting tool T2 around the machining axis B, and the axial movement of the slide spindle 5 is the swivel. The case 12 is provided with a turning drive mechanism 14 for converting into a turning operation about the parallel turning axis A in a plane perpendicular to the rotating main shaft 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a detachable spindle turning control unit that can be freely attached to and detached from a spindle of a machine tool, etc. Specifically, it can be used in a machine tool equipped with a payout spindle and utilizes the axial movement of a slide spindle. As a result, the present invention relates to a swing control unit that enables swing control without providing a dedicated swing drive source.

[0002]

[Prior art]

 The swivel control device is a device that can control the angular position of the cutting tool around an axis that is parallel to or perpendicular to the main axis, allowing holes to be machined from multiple directions while the workpiece is fixed. Therefore, various structures have been conventionally proposed as a structure for controlling the turning of the cutting tool. For example, a drive device for turning control, which is separate from the drive source for the spindle, is provided to perform turning control (see, for example, Japanese Utility Model Laid-Open No. 64-26137 and Japanese Unexamined Patent Publication No. 3-50652). There are those which perform the turning control by utilizing it (see Japanese Patent Publication No. 3-4339) or those which perform the turning control by an X, Y table (see Japanese Patent Laid-Open No. 3-21296).

However, since all of them have a structure to be built into the machine tool from the beginning, they cannot be mounted on the existing machine tool later. Therefore, a detachable spindle turning control unit has been proposed that can be attached to and removed from existing machine tools later. For example, a holder that can be removably attached to a blade holding taper hole of a spindle is provided, and the blade is rotatably attached to the holder around the spindle. Then, the cutting tool is rotated around the main axis by a separate and independent drive source (for example, a servo motor) provided in this holder.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional detachable spindle turning control unit requires a separate and independent drive source, resulting in high cost, and even if it can be mounted on an existing machine tool later, electrical wiring, NC device, cover, etc. There is a problem that the control becomes complicated because it needs to be modified and the number of control axes is increased by one.

The present invention has been made in view of the above-mentioned conventional situation, and particularly in a machine tool having a payout spindle, a payout spindle that does not need to be modified without providing a separate and independent drive source is provided. It is an object of the present invention to provide a detachable spindle turning control unit for machine tools.

[0006]

[Means for Solving the Problems]

 According to the invention of claim 1, a slide spindle having a cutting tool attached to the tip thereof is inserted into the rotary spindle, and the slide spindle is rotationally driven together with the rotary spindle and is moved in the axial direction. A detachable spindle turning control unit detachably mounted on a machine tool, wherein the unit case is detachably and non-rotatably attached to the spindle case, and the unit case is parallel to the rotary spindle. A swivel case mounted so as to be rotatable about a swivel axis, a cutting tool mounted on the swivel case so as to be rotatable about a machining axis perpendicular to the swivel axis, and a rotation of the rotary spindle for the machining axis of the cutting tool. A rotary drive mechanism that converts the rotation into a rotational rotation and an axial operation of the slide spindle is converted into a rotational movement around a parallel pivot axis in a plane perpendicular to the rotary spindle of the swivel case. It is characterized in that a rotary drive mechanism.

According to a second aspect of the present invention, the swivel case according to the first aspect of the present invention is mounted so as to be rotatable about a right-angled swivel axis that is perpendicular to the rotary spindle, and the swivel drive mechanism is used to perform axial movement of the slide spindle. It is characterized in that it is converted into a rotational movement around the right-angled turning axis in a plane parallel to the main axis of rotation and transmitted to the turning case.

According to a third aspect of the present invention, the unit case according to the second aspect of the present invention is mounted on the spindle case substantially detachably and rotatably around the rotary spindle, and the unit case is attached by a turning drive mechanism. It is characterized in that it is adapted to be rotated around the above-mentioned rotation main axis.

[0009]

[Action]

 In the detachable spindle turning control unit according to the present invention, the rotation of the rotary spindle is transmitted to the cutting tool by the rotary drive mechanism, whereby the cutting tool rotates about the machining axis. In this case, when the slide spindle is moved in the axial direction, this axial movement is converted by the swing drive mechanism into a swing movement about a swing axis parallel to or perpendicular to the rotary spindle and transmitted to the cutting tool. This controls the angular position of the cutting tool about the parallel pivot axis or the right-angle pivot axis.

Further, in the invention of claim 3, the unit case is driven to rotate about the rotation main axis by the rotation drive mechanism, whereby the cutting tool is rotated in addition to the angular position about the rotation axis and the angle about the rotation main axis. The position is also controlled.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 are views for explaining a detachable spindle turning control unit according to a first embodiment of the first aspect of the invention, and FIG. 1 is a sectional view showing a state in which the embodiment unit is mounted on a machine tool. 2 is a side view, FIG. 2 is a front view of the mounted state, FIG. 3 is a sectional side view of a state in which a cutting tool is mounted before mounting the control unit, and FIG. 4 is a schematic configuration diagram of the machine tool of the embodiment. .

In FIG. 4, reference numeral 1 denotes a feeding spindle of a machine tool configured so that the spindle turning control unit of this embodiment can be mounted. The main shaft case 1c of the feeding main shaft 1 is supported by a base 8 so as to be movable in the Z-axis direction in the figure. The Z-axis ball screw 1b is screwed into the ball nut 1a fixed to the case 1c, and the ball screw 1b is inserted. It can be moved in the Z-axis direction by rotationally driving the spindle motor M2.

A rotary spindle 2 is inserted into the spindle case 1c so as to be rotatable by bearings 3a to 3c and immovable in the axial direction. The rotary spindle 2 is rotationally driven by a spindle drive motor M1 via transmission mechanisms 4a and 4b. A slide spindle 5 is inserted in the rotary spindle 2 so as to be slidable in the axial direction. The slide spindle 5 is fixed to the rotary spindle 2 by a sliding key 6 in the rotational direction, and rotates together with the rotary spindle 5. A draw hole 5a is formed through the axis of the slide spindle 5, and a tapered holding hole 5b for holding the cutting tool T1 is formed at the front end of the draw hole 5a.

A draw bar 5d is inserted in the draw hole 5a. The draw bar 5d is for pulling the collet 5c that locks the cutting tool T1 (see FIG. 3) inserted into the holding hole 5b to the right in the drawing, or for protruding the cutting tool T1. Reference numeral 5e is a disc spring that biases the draw bar 5d in the lock direction, and 5f is a release rod that presses the draw bar 5d in the lock release direction.

A bracket 7 is mounted on the rear end of the slide spindle 5 via a bearing 7a. A ball screw 7b for driving a slide spindle is screwed into a ball nut 7c fixed to the bracket 7, and the ball screw 7b is rotationally driven by a drive motor M3. As a result, the slide spindle 5 rotates together with the rotary spindle 2 and can be extended in the Z-axis direction.

In FIGS. 1 and 2, reference numeral 10 denotes a spindle turning control unit of the present embodiment, which is a unit case 11 that is substantially detachably attached to the spindle case 1c and is non-rotatably mounted. And a swivel case 12 mounted on the unit case 11 so as to be rotatable about a parallel swivel axis A parallel to the Z axis, and rotatable on the swivel case 12 about a processing axis B perpendicular to the parallel swivel axis A. And a rotary drive mechanism 13 for converting the rotation of the rotary spindle 2 into the rotation around the machining axis B of the blade T2 and transmitting the rotation to the blade T2, and the axial direction of the slide spindle 5. It is composed of a parallel axis turning drive mechanism 14 for converting and transmitting the operation into a turning operation about the parallel turning axis A in a plane perpendicular to the Z main axis of the cutting tool T2.

The unit case 11 is rotatably supported by a gear cylinder 15 forming a part of the rotary drive mechanism 13 via a bearing 15 a. The gear cylinder 15 has a tapered end portion of the rotary main shaft 2. 2a is fitted and fixed by a fixing nut 16. Further, the unit case 11 is prevented from rotating by inserting the retaining pin 11a into the retaining hole 17a of the fixing flange 17. As a result, the unit case 11 is attached to the main shaft case 1c in a substantially removable and non-rotatable manner.

The swivel case 12 is rotatably supported on the lower part of the tip of the unit case 11 via a bearing 11 b so as to be rotatable about the parallel swivel axis A. The base of the cutting tool T2 is fixed to the tip of a rotary shaft 18 forming a part of the rotary drive mechanism 13 with a fixing nut 19. The rotary drive mechanism 13 includes a gear cylinder 15 having a drive gear 15b formed on the outer periphery thereof, an intermediate shaft 20 rotatably supported by a bearing 20a so as to be rotatable about the parallel turning axis A, and an intermediate shaft 20 meshing with the drive gear 15b. The rotary shaft 18 is rotatably supported by a bearing 18a so as to be rotatable around the machining shaft B and meshes with the intermediate shaft 20.

The parallel shaft turning drive mechanism 14 connects the rack 22 to the holder 21 held in the holding hole 5b of the slide spindle 5 via the bearing 21a, and the rack gear 22a of the rack gear 22a of the unit case 11 is connected. It has a structure in which it is meshed with a pinion 23 a of an intermediate shaft 23 pivotally supported at the tip, and a worm 23 b of the intermediate shaft 23 is meshed with a worm gear 12 a formed on the outer circumference of the swivel case 12.

Next, the function and effect of the apparatus of this embodiment will be described. When the machine tool of this embodiment is used in a normal state, as shown in FIGS. 3 and 4, a blade tool T1 is attached to the slide spindle 5, and in this state the rotary spindle 2 is transmitted by a spindle drive motor M1. When driven to rotate via 4a and 4b, the slide spindle 5 rotates together with the rotary spindle 2. Further, in this state, the rotation of the drive motor M3 causes the slide spindle 5 to move in the axial direction via the ball screw 7b, the ball nut 7c, and the bracket 7, thereby performing the machining.

When performing the spindle turning control, first, the drawbar 5d is advanced by the release rod 5f to remove the cutting tool T1 from the slide spindle 5, and the spindle turning control unit 10 is mounted. In this case, if the holder 21 is inserted into the holding hole 5b of the slide spindle 5, the collet 5c is hooked on the hooking piece 21b of the holder 21, and the release rod 5f is moved backward, the drawbar 5e biases the drawbar. 5d pulls the collet 5c to lock the holder 21 in the holding hole 5b. Then, the gear cylinder 15 is fitted into the tip taper portion 2a of the rotary main shaft 2, and the gear cylinder 15 is fixed to the rotary main shaft 2 with a fixing nut 16. At this time, the locking pin 11a of the unit case 11 is locked in the locking hole 17a of the fixed flange 17 to prevent the unit case 11 from rotating.

After mounting the main spindle turning control unit 10, the main spindle drive motor M1 rotationally drives the rotary main spindle 2. Then, the slide spindle 5 rotates together with the rotary spindle 2, and the rotation of the rotary spindle 2 is transmitted to the cutting tool T2 by the rotary drive mechanism 13 via the gear cylinder 15, the intermediate shaft 20, and the rotary shaft 18, and thereby the machining is performed. Is done. In this case, the Z-axis feed is performed by moving the payout spindle 1 together with the spindle case 1c by the spindle feed motor M2.

The turning control of the spindle, that is, the control of the machining direction is performed by sending the slide spindle 5 in the Z-axis direction by the drive motor M3. That is, as the slide main shaft 5 moves, the holder 21 moves together with the rack 22 to rotate the intermediate shaft 23, and the intermediate shaft 23 rotates the swivel case 12 around the parallel swivel axis A. The angular position of 12 is changed and the direction is controlled to the desired direction.

As described above, in the present embodiment, by mounting the spindle turning control unit 10 while maintaining the normal feeding mechanism and function, the spindle turning control processing can be realized by one machine tool. .

In this case, the drive motor M3, the ball screw 7b, etc. for performing the normal feeding process and the slide spindle 5 can be used as they are as the drive source for the spindle turning control. Since it does not require a drive source dedicated to separate and independent spindle rotation control, the problem of high cost can be avoided.

5 and 6 show a spindle turning control unit according to a second embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts. The spindle rotation control unit 30 of the present embodiment includes a unit case 11, a rotation case 12, a cutting tool T2, a rotation drive mechanism 13, and a right-angle axis rotation drive mechanism 14 ', and has a basic configuration. Is the same as the first embodiment according to the first aspect of the present invention.

The swivel case 12 has a support shaft 12b whose axis is a right-angled swivel axis A ′ that is perpendicular to the Z axis, and the support shaft 12b is provided below the tip of the unit case 11 via a bearing 12c. It is rotatably supported. A pinion gear 12a having the right-angled swivel axis A'as a central axis is formed on one axial side of the swivel case 12.

The rotary drive mechanism 13 includes a gear cylinder 15, an intermediate shaft 20 that meshes with a drive gear 15 b of the gear cylinder 15, and a rotary shaft 18 that meshes with the intermediate shaft 20 via an intermediate bevel gear 23. Has been done.

The right-angle swivel drive mechanism 14 ′ has a structure in which the rack gear 22 a of the rack 22 connected to the holder 21 is meshed with the pinion gear 12 a formed on the outer circumference of the swivel case 12. .

Also in the structure of this embodiment, as in the first embodiment, the rotation of the rotary spindle 2 is transmitted to the cutting tool T2 via the rotary drive mechanism 13. When the slide spindle 5 moves in the axial direction, this axial movement is converted into a rotational movement by the rack gear 22a of the rack 22 and the pinion gear 12a of the turning case 12, whereby the turning case 12 turns about the right-angle turning axis A '. However, the processing direction is controlled.

7 and 8 are views for explaining a third embodiment according to the third aspect of the present invention, in which the same reference numerals as those in FIGS. 1 to 6 denote the same or corresponding parts. The present embodiment is an example in which the cutting tool T2 can be swung both around the Z axis and around the right angle swivel axis A '.

The turning control unit 40 of the present embodiment is the same as the control unit 30 of the second embodiment, except that the unit case 11 is rotatable about the Z axis with respect to the spindle case 1c. A Z-axis (spindle) rotation drive mechanism 25 for rotating and driving the unit case 11 is added.

The Z-axis turning drive mechanism 25 has the following structure. The hook pin 11a of the unit case 11 is inserted into the pin hole 24b of the swivel flange 24, and the swivel flange 24 is fixed to the tip of the main shaft case 1c by a fixing flange 17 which is fixed by bolts through the bearing 24a. Support. Then, the drive gear 27a of the servo motor 27 is connected to the turning teeth 24c formed on the outer circumference of the turning flange 24 via the intermediate gear 26.

In the apparatus of this embodiment, the cutting tool T2 rotates around the machining axis B by the rotation of the rotary spindle 2 as in the case of the second embodiment, and the right-angled swivel axis A is caused by the axial movement of the slide spindle 5. 'Turn around. Further, the rotation of the servo motor 27 of the Z-axis swivel drive mechanism 25 is transmitted from the swivel drive gear 27a to the swivel flange 24 via the intermediate shaft 26, whereby the entire unit case 11 swivels around the Z axis.

[0035]

[Effect of device]

 As described above, according to the detachable spindle turning control unit for a machine tool according to the present invention, by mounting the unit on the rotary spindle portion, it is possible to perform general feeding processing and rotation around a rotary axis parallel or perpendicular to the rotary spindle. This has the effect that both of the spindle rotation control machining can be realized with one machine, and in this case, the axial movement of the slide spindle is converted into a turning movement to move the cutting tool, so the spindle rotation A drive source dedicated to control is not required, and there is no need to modify the machine body, which has the effect of simplifying the structure and control configuration. According to the third aspect of the invention, in addition to the turning control about the right-angle turning axis, the turning control about the rotary spindle can be realized, and the range of the turning control can be greatly expanded.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a mounted state of a spindle turning control unit of a first embodiment according to the first aspect of the invention.

FIG. 2 is a front view of the unit of the first embodiment.

FIG. 3 is a sectional side view of a state in which a cutting tool is mounted instead of the spindle turning control unit.

FIG. 4 is a schematic configuration diagram of a payout spindle in which the unit of the first embodiment is mounted.

FIG. 5 is a sectional side view showing a mounted state of a spindle turning control unit of a second embodiment according to the invention of claim 2;

FIG. 6 is a front view of the unit of the second embodiment.

FIG. 7 is a sectional side view showing a mounted state of a spindle turning control unit of a third embodiment according to the invention of claim 3;

FIG. 8 is a front view of the unit of the third embodiment.

[Explanation of symbols]

 1 Feeding Spindle 1c Spindle Case 2 Rotating Spindle 5 Slide Spindle 10, 30, 40 Spindle Spinning Control Unit 11 Unit Case 12 Swing Case 13 Rotation Drive Mechanism 14 Parallel Shaft Rotation Drive Mechanism 14 'Right Angle Axis Rotation Drive Mechanism 25 Spindle Rotation Drive mechanism T1 Cutting tool T2 Cutting tool A Parallel rotation axis A'Right angle rotation axis B Processing axis

Claims (3)

[Scope of utility model registration request] 1. A rotary main shaft rotatably disposed in a main shaft case, and a slide which is inserted into the rotary main shaft so as to rotate together with the rotary main shaft and to be movable in the axial direction, and has a cutting tool attached to a tip end thereof. A spindle rotation control unit detachably mounted on a machine tool having a payout spindle composed of a spindle and a unit case which is substantially detachably and non-rotatably mounted on the spindle case. A swivel case mounted rotatably about a parallel swivel axis parallel to the rotary main shaft, a cutting tool mounted on the swivel case rotatable about a machining axis perpendicular to the parallel rotary shaft, and the rotary main shaft. A rotation drive mechanism for converting the rotation of the cutting tool into a rotation about the processing axis of the cutting tool, and the axial movement of the slide spindle about the parallel turning axis in a plane perpendicular to the rotation spindle of the turning case. A detachable spindle revolving control unit for machine tools, comprising: a revolving drive mechanism for rotating about a parallel axis, which is converted into a revolving operation. 2. A rotary main shaft rotatably disposed in a main shaft case, and a slide which is inserted into the rotary main shaft so as to rotate together with the rotary main shaft and is movable in the axial direction and has a cutting tool attached to a tip end thereof. A spindle rotation control unit detachably mounted on a machine tool having a payout spindle composed of a spindle and a unit case which is substantially detachably and non-rotatably mounted on the spindle case. A swivel case mounted rotatably about a right-angled swivel axis perpendicular to the rotary spindle, a cutting tool mounted on the swivel case rotatable around a machining axis perpendicular to the right-angled swivel axis, and the rotary spindle. A rotation drive mechanism for converting the rotation of the cutting tool into a rotation about the processing axis of the cutting tool, and the axial movement of the slide spindle about the right-angle turning axis in a plane parallel to the rotation spindle of the turning case. A detachable spindle rotation control unit for machine tools, comprising: a rotation drive mechanism for rotating around a right-angle axis, which is converted into a rotation operation. 3. A rotary main shaft rotatably disposed in a main shaft case, and a slide which is inserted into the rotary main shaft so as to rotate together with the rotary main shaft and is movable in the axial direction and has a cutting tool attached to a tip end thereof. A spindle rotation control unit detachably mounted on a machine tool having a payout spindle composed of a spindle, the unit being substantially detachably mounted on the spindle case and rotatable about the rotary spindle. A case, a swivel case mounted on the unit case so as to be rotatable about a right-angled swivel axis perpendicular to the rotating main shaft, and a swivel case mounted on the swivel case so as to be rotatable about a machining axis perpendicular to the right-angled swivel axis. A cutting tool, a rotation drive mechanism around a spindle for rotating the unit case around the rotation spindle, a rotation drive mechanism for converting rotation of the rotation spindle into rotation around the machining axis of the cutting tool, and the slurry. A machine tool including a right-angle swivel drive mechanism for converting an axial motion of the id main shaft into a rotary motion about the right-angle swivel axis in a plane parallel to the rotary main shaft of the swivel case. Detachable spindle rotation control unit.